What applications use Hyvolt transformer oil?

Hyvolt is commonly used as a mineral insulating oil in transformers and related oil filled electrical equipment where mineral oil is specified for dielectric insulation and cooling. Typical applications include distribution transformers, power transformers, and industrial substations. Utilities may choose it for new fill, top ups, or after oil treatment, provided it meets the required specification such as IEC 60296 or applicable ASTM requirements. The exact use depends on the specific Hyvolt grade, inhibitor status, and approved vendor lists.